using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        getAns(line);
    }
    static void getAns(string[] line)
    {
        var ans = "";
        foreach (var x in line) ans += x[0].ToString().ToUpper();
        Console.WriteLine(ans);
    }
}